Organizer Erika Biddle said she was inspired by the 2003 movie Calendar Girls, a true account of older British women who pose nude for a calendar to raise money for a friend with leukemia. Biddle’s Earth calendar was printed on chlorine-free, recycled paper and used soy inks.

“When I saw the movie, I thought, ‘Why don’t we do it?’” said Biddle, a 63-year-old radio show host. She began recruiting women who were ultimately photographed in various states of undress, some appearing totally naked and others covered with strategically placed strips of fabric or items of clothing. (The women decided just how “natural” they wanted to appear.)

Amy Culver, who posed under a waterfall wearing a white shirt, said when Biddle called she said, “Do you have the right number?”

“But then I thought about it,” said Culver, 44, who works on environmental issues. “So many young girls perceive the perfect size to be 0, 2 or 4. This is a golden opportunity to be celebrating natural beauty without facelifts and everything else.”

The calendar was photographed around Florida, with a steady supply of champagne on hand to calm the models’ nerves. Each month’s photo features a corresponding quote.

With the calendar sold out, Biddle says she is having more printed to meet the growing demand.

“It took a while to get used to the idea,” said Shirley Freeman, 74, a former mayor and commissioner of Monroe County. “This is a different side of me I really never have explored. And,” she said, “it’s for a good cause.”